CUFF (first picture)use a tape measure around the wrist.let's say you get 17 cm.your ideal CUFF/OPEN BRACELET size would be 17 cm(for loose fit go with 18 cm, for tight fit go with 16 cm) the bracelets are slightly adjustable.

BANGLES (second picture)"shrink" your hand as much as possible by the knuckles' widest point,as if you would thread a bangle over your hand.measure the circumference, i.e. 21 cm.your ideal BANGLE size would be 21cm(for loose fit go with 22 cm) the bangles are slightly bendable.FOR CUSTOM SIZES OR QUESTIONS, SEND AN EMAIL TO contact@ddsthlm.com